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https://issues.apache.org/jira/browse/LUCENE-8991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16946441#comment-16946441
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ASF subversion and git services commented on LUCENE-8991:
---------------------------------------------------------
Commit bc0652ecc09ba6b82d86a8050b541a96f2a0f888 in lucene-solr's branch
refs/heads/jira/SOLR-13821 from Chris M. Hostetter
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=bc0652e ]
LUCENE-8991: disable HashMap assertions (by default) on java9 and java1.8 as
well
> disable java.util.HashMap assertions to avoid spurious vailures due to
> JDK-8205399
> ----------------------------------------------------------------------------------
>
> Key: LUCENE-8991
> URL: https://issues.apache.org/jira/browse/LUCENE-8991
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Chris M. Hostetter
> Assignee: Chris M. Hostetter
> Priority: Major
> Labels: Java10, Java11
> Fix For: master (9.0), 8.3
>
> Attachments: LUCENE-8991.patch, LUCENE-8991.patch
>
>
> An incredibly common class of jenkins failure (at least in Solr tests) stems
> from triggering assertion failures in java.util.HashMap -- evidently
> triggering bug JDK-8205399, first introduced in java-10, and fixed in
> java-12, but has never been backported to any java-10 or java-11 bug fix
> release...
> https://bugs.openjdk.java.net/browse/JDK-8205399
> SOLR-13653 tracks how this bug can affect Solr users, but I think it would
> make sense to disable java.util.HashMap in our build system to reduce the
> confusing failures when users/jenkins runs tests, since there is nothing we
> can do to work around this when testing with java-11 (or java-10 on branch_8x)
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